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Epic exoplanet 55 EP

HD 206893 b

RA 326.3417° · Dec -12.7834° · exoplanet

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Score breakdown

· 6 badges
55 pts · Epic
Epic 78 pts → Anomaly
  • Directly imaged +16
  • Lava world +14
  • Long-period world +10
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 55

23 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Lava world · +14
  • Long-period world · +10
  • Multi-planet system · +6
  • Directly imaged · +16

Trivia

What makes it special

  • Lava world. Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

Hard to believe

  • Denser than iron. It is packed tighter than solid iron — whatever it is made of, it is not ordinary rock.

What it actually is

  • What it is made of. Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.
  • Crowded system. One of at least 2 planets orbiting its star.

Sense of scale

  • In perspective. Far away by human standards, yet still a local address inside the Milky Way's spiral arms.

Find it in the sky

  • How to spot it. At magnitude 6.7 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around August — that's when to go looking.

Properties

density gcc
12.4
diameter km
178729.9994
discovery facility
Gemini Observatory
discovery method
Imaging
discovery year
2021
dist ly
132.9356
eccentricity
0.069
eq temp k
1429.2
host star teff
6500
inclination
142
insolation
0.0247
mag
6.688
mass earth
6197.6539
name
HD 206893 b
orbital period days
11100
radius earth
14.0112
semi major au
10.75
spect
F5 V
sys num planets
2
sys num stars
1

About HD 206893 b

HD 206893 b is an epic exoplanet. It lies about 132.9 light-years from Earth, shines at apparent magnitude 6.69, has spectral type F5 V and has an equilibrium temperature near 1,429 K.

Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

How to see it

At apparent magnitude 6.69, it is an easy target for binoculars.

Like any astronomical target, HD 206893 b is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.

Why HD 206893 b is an epic exoplanet

HD 206893 b scores 55 points on Spacedle's rarity scale, which places it in the epic tier. Another 23 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Gas giant, Lava world, Long-period world, Multi-planet system and Directly imaged — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.